<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="../00.插件/babel.min.js"></script>
  <script src="../00.插件/react.development.js"></script>
  <script src="../00.插件/react-dom.development.js"></script>
</head>

<body>
  <button id="btn">修改vDOM,并重新渲染</button>
  <div id="app"></div>
  <script type="text/babel">
    const vDOM = (
      <div>
        <h1>diffing算法</h1>
        <p>真NP</p>  
      </div>
    )
    const root = ReactDOM.createRoot(document.getElementById('app'));
    root.render(vDOM)


    //给按钮绑定点击事件,修改vDOM 重新渲染
    //当点击的时候,发现只有p标签重新渲染,其他元素还在浏览中保留
    const oBtn = document.getElementById('btn');
    oBtn.onclick  = function(){
      const vDOM = (
        <div>
          <p>超级NB</p> 
          <h1>diffing算法</h1>
           
        </div>
      )
      root.render(vDOM)
    }
  </script>
</body>

</html>